Arkadiusz Milik has travelled to France to complete a loan move to Marseille, reports Sky Sports in Italy.
The Poland international has fallen out of favour at Napoli. He is yet to make an appearance under manager Gennaro Gattuso this season, having been left out of their Serie A and Europa League squads.
Prior to this season, Milik had enjoyed a strong spell at Gli Azzurri. He has scored 48 goals in all competitions for Napoli since signing from Ajax in the summer transfer window of 2016, despite injuries hampering him for the first two years.